<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator="/">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>用户管理</el-breadcrumb-item>
        <el-breadcrumb-item>用户列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片 -->
    <el-card class="box-card">       
        <!-- 搜索与添加，栅格系统，每一行都是一个row，里面有很多col -->
        <el-row :gutter="20">
            <!-- 搜索输入框 -->
            <el-col :span="8">
                <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear="getUserList">
                    <el-button slot="append" icon="el-icon-search" @click="getUserList"></el-button>
                </el-input>
            </el-col>
            <!-- 添加按钮 -->
            <el-col :span="6">
                <el-button type="primary" @click="addDialogVisible = true">添加用户</el-button>
            </el-col>
        </el-row>

        <!-- 用户列表 -->
        <el-table :data="userList" border stripe>
          <el-table-column type="index"></el-table-column>
          <el-table-column label="用户名" prop="username"></el-table-column>
          <el-table-column label="邮箱" prop="email"></el-table-column>
          <el-table-column label="电话" prop="mobile"></el-table-column>
          <el-table-column label="角色" prop="role_name"></el-table-column>
          <el-table-column label="状态">
              <!-- 使用作用域插槽和开关组件渲染 -->
              <template slot-scope="scope">                 
                  <el-switch v-model="scope.row.mg_state" @change="userStateChanged(scope.row)"></el-switch>
              </template>
          </el-table-column>
          <el-table-column label="操作">
              <template slot-scope="scope">
                  <!-- 修改按钮 -->
                  <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)"></el-button>                     
                  <!-- 删除按钮 -->
                  <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeUserById(scope.row.id)"></el-button>             
                  <!-- 分配角色按钮 -->
                  <el-tooltip effect="dark" content="分配角色按钮" placement="top-start" :enterable="false">
                    <el-button type="primary" icon="el-icon-setting" size="mini" @click="setRole(scope.row)"></el-button>
                  </el-tooltip>               
              </template>
          </el-table-column>
        </el-table>

        <!-- 页码条 -->
        <el-pagination
            @size-change="handleSizeChange"
            @current-change="handleCurrentChange"
            :current-page="queryInfo.pagenum"
            :page-sizes="[1, 2, 5, 10]"
            :page-size="queryInfo.pagesize"
            layout="total, sizes, prev, pager, next, jumper"
            :total="total">
        </el-pagination>

        <!-- 添加用户的对话框 -->
        <el-dialog
        title="添加用户"
        :visible.sync="addDialogVisible"
        width="50%"
        @close="addDialogClosed">
            <!-- 内容主体区 -->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
                <el-form-item label="用户名" prop="username">
                    <el-input v-model="addForm.username"></el-input>
                </el-form-item>
                <el-form-item label="密码" prop="password">
                    <el-input v-model="addForm.password" type="password"></el-input>
                </el-form-item>
                <el-form-item label="邮箱" prop="email">
                    <el-input v-model="addForm.email"></el-input>
                </el-form-item>
                <el-form-item label="手机" prop="mobile">
                    <el-input v-model="addForm.mobile"></el-input>
                </el-form-item>
            </el-form>
            <!-- 底部区 -->
            <span slot="footer" class="dialog-footer">
                <el-button @click="addDialogVisible = false">取 消</el-button>
                <el-button  type="primary" @click="addUser" >确 定</el-button>
            </span>
        </el-dialog>

        <!-- 修改用户的对话框 -->
        <el-dialog
        title="修改用户"
        :visible.sync="editDialogVisible"
        width="50%"
        @closed="editDialogClosed">
            <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
                <el-form-item label="用户名">
                    <el-input v-model="editForm.username" disabled></el-input>
                </el-form-item>
                <el-form-item label="用户邮箱" prop="email">
                    <el-input v-model="editForm.email"></el-input>
                </el-form-item>
                <el-form-item label="用户手机" prop="mobile">
                    <el-input v-model="editForm.mobile"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editUserInfo">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 分配权限对话框 -->
        <el-dialog
        title="分配权限"
        :visible.sync="setRoleDialogVisible"
        width="50%"
        @close="saveRoleDialogClosed">
            <div>
                <p>当前用户名称：{{userInfo.username}}</p>
                <p>当前角色名称：{{userInfo.role_name}}</p>
                 <el-select v-model="selectedRoleId" placeholder="请选择">
                    <el-option
                    v-for="item in roleList"
                    :key="item.id"
                    :label="item.roleName"
                    :value="item.id">
                    </el-option>
                </el-select>
            </div>
            <span slot="footer">
                <el-button @click="setRoleDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="saveRoleInfo">确 定</el-button>
            </span>
        </el-dialog>
    </el-card>
  </div>
</template>

<script>
export default {
    data(){
         // 自定义邮箱验证规则
        var checkEmail =(rule,value,cb)=>{
            const regEmail = /^\w+((-\w+)|(\.\w+))*@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/;
            if(regEmail.test(value)){
                return cb();
            }
            cb(new Error('请输入合法的邮箱'));
        };
        // 自定义手机验证规则
        var checkMobile = (rule,value,cb)=>{
            const regMobile = /^[1][3,4,5,7,8][0-9]{9}$/;
            if(regMobile.test(value)){
                return cb();
            }
            cb(new Error('请输入合法的手机号码'))
        };
        return {  
            queryInfo:{
                query:'',
                pagenum:1,
                pagesize:2
            },
            userList:[],
            total:0,

            // 控制添加用户对话框的显示与隐藏
            addDialogVisible:false,
            // 添加用户的表单数据
            addForm:{
                username:'',
                password:'',
                email:'',
                mobile:''
            },           
            // 添加用户的表单验证规则
            addFormRules:{
                username:[
                    {
                        required:true,
                        message:'请输入用户名称',
                        trigger:'blur'
                    },
                    {
                        min:3,
                        max:8,
                        message: '长度在 3 到 5 个字符',
                        trigger:'blur'
                    }
                ],
                password:[
                    {
                        required:true,
                        message:'请输入密码',
                        trigger:'blur'
                    },
                    {
                        min:6,
                        max:15,
                        message: '长度在 6 到 15 个字符',
                        trigger:'blur'
                    }
                ],
                email:[
                    {
                        required:true,
                        message:'请输入邮箱',
                        trigger:'blur'
                    },
                    {
                        min:6,
                        max:20,
                        message: '长度在 6 到 20 个字符',
                        trigger:'blur'
                    },
                    {validator:checkEmail,trigger:'blur'}
                ],
                mobile:[
                    {
                        required:true,
                        message:'请输入手机',
                        trigger:'blur'
                    },
                    {
                        min:11,
                        max:11,
                        message: '长度是 11个字符',
                        trigger:'blur'
                    },
                    {validator:checkMobile,trigger:'blur'}
                ]
                
            },

            // 控制修改用户对话框的显示与隐藏
            editDialogVisible:false,

            // 查询到的用户信息对象，先查询再修改
            editForm:{
            },
            // 修改用户的表单验证规则
            editFormRules:{
                email:[
                    {
                        required:true,
                        message:'请输入邮箱',
                        trigger:'blur'
                    },
                    {
                        min:6,
                        max:20,
                        message: '长度在 6 到 20 个字符',
                        trigger:'blur'
                    },
                    {validator:checkEmail,trigger:'blur'}
                ],
                mobile:[
                    {
                        required:true,
                        message:'请输入手机',
                        trigger:'blur'
                    },
                    {
                        min:11,
                        max:11,
                        message: '长度是 11个字符',
                        trigger:'blur'
                    },
                    {validator:checkMobile,trigger:'blur'}
                ]
            },

            // 分配角色对话框的显示与隐藏
            setRoleDialogVisible:false,
            // 获取的用户信息,需要点出来到页面上渲染
            userInfo:'',
            // 获取的角色列表，需要渲染到界面上供用户选择
            roleList:[],
            // 已选中的角色id（动态绑定到value），会显示在选择框里
            selectedRoleId:''

        }

    },
    created(){
        this.getUserList();
    },
    methods:{
        // 获取用户列表数据
        async getUserList(){
            const {data:res} = await this.$http.get('users',{
                 params:this.queryInfo 
            });
            if(res.meta.status!==200) return this.$message.error(res.meta.msg);
            // console.log(res);
            this.userList=res.data.users;
            this.total=res.data.total;
        },
        // 监听每页显示的条数pagesize 变化，当每页显示的跳数变化时，把它赋给queryInfo，并重新渲染页面
        handleSizeChange(newSize){
            // console.log(newSize);
            this.queryInfo.pagesize = newSize;
            this.getUserList();
        },
        // 监听页码值pagenum 改变的事件处理函数
        handleCurrentChange(newPage){
            // console.log(newPage);
            this.queryInfo.pagenum = newPage;
            this.getUserList();
        },
        // 修改用户状态,监听change事件，当页面开关值变化时触发，发送put请求，根据status判断能否修改成功，如果失败，让页面的状态userInfo.mg_state改变，这样页面刷新时状态不会复原
        async userStateChanged(userInfo){
            console.log(userInfo);
            const {data:res} = await this.$http.put(`users/${userInfo.id}/state/${userInfo.mg_state}`);
            if(res.meta.status!==200){
                // 让页面的状态改变
                userInfo.mg_state=!userInfo.mg_state;
                return this.$message.error(res.meta.msg);
            }
            this.$message.success(res.meta.msg);
        },
        // 监听添加对话框的关闭事件
        addDialogClosed(){
            this.$refs.addFormRef.resetFields();
        },
        // 添加用户
        addUser(){
            this.$refs.addFormRef.validate(async (valid)=>{
                if(!valid) return;
                const {data:res} = await this.$http.post('users',this.addForm);
                if(res.meta.status!==201) return this.$message.error(res.meta.msg);
                this.$message.success(res.meta.msg);
                // 隐藏添加用户对话框
                this.addDialogVisible = false;
                // 重新渲染用户列表
                this.getUserList();
            })
        },

        // 根据id查询需要修改的用户数据并保存
        async showEditDialog(id){
            // 查询用户根据传过来的哪条用户的id，请求该条数据
            const {data:res} = await this.$http.get(`users/${id}`);
            if(res.meta.status!==200) return this.$message.error('需要修改的用户获取失败');
            this.editForm = res.data;
            this.editDialogVisible = true;
        },
        // 监听修改对话框的关闭事件
        editDialogClosed(){
            this.$refs.editFormRef.resetFields();
        },
        // 修改用户信息并提交，要先预验证，再向数据库发起请求
        editUserInfo(){
            this.$refs.editFormRef.validate(async (valid)=>{
                if(!valid) return ;
                // 发起修改请求
                const {data:res} = await this.$http.put(`users/${this.editForm.id}`,
                {
                    email:this.editForm.email,
                    mobile:this.editForm.mobile
                });
                if(res.meta.status!==200) return this.$message.error('更新用户信息失败');
                // 关闭对话框、刷新用户数据列表、提示修改成功
                this.editDialogVisible = false;
                this.getUserList();
                this.$message.success('更新用户信息成功');


            })
        },

        // 根据id删除用户信息
        async removeUserById(id){
            // 询问用户是否删除数据
            const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err=>err)

            // 如果用户确认删除，返回字符串confirm 
            // 如果用户取消删除，返回字符串cancel
            if(confirmResult!=='confirm'){
                return this.$message.info('已取消删除')
            }

            const {data:res} = await this.$http.delete(`users/${id}`)
            if(res.meta.status!==200) return this.$message.error('删除用户失败');
            this.$message.success('删除用户成功');
            this.getUserList();
        },

        // 分配角色
        async setRole(userInfo){
            this.userInfo = userInfo;
            console.log(userInfo);

            // 在显示对话框之前，把角色列表获取出来供用户分配
            const {data:res} = await this.$http.get('roles');
            if(res.meta.status!==200) return this.$message.error('获取角色列表失败');
            this.roleList = res.data;

            this.setRoleDialogVisible = true;
        },

        // 点击确定分配角色
        async saveRoleInfo(){
            // 判断是否已经选择了角色
            if(!this.selectedRoleId) return this.$message.error('未选择角色');

            const {data:res} = await this.$http.put(`users/${this.userInfo.id}/role`,{rid:this.selectedRoleId})
            if(res.meta.status!==200) return this.$message.error('分配角色失败');

            this.$message.success('分配角色成功');
            this.getUserList();
            this.setRoleDialogVisible = false
        },

        // 监听分配角色对话框的关闭事件，此时清空对话框中的信息
        saveRoleDialogClosed(){
            this.userInfo = {};
            this.selectedRoleId = '';
        }
    }
}
</script>

<style>

</style>